CN114717380A - Supersonic secondary combustion oxygen lance for improving converter steel scrap ratio - Google Patents
Supersonic secondary combustion oxygen lance for improving converter steel scrap ratio Download PDFInfo
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- CN114717380A CN114717380A CN202210278053.4A CN202210278053A CN114717380A CN 114717380 A CN114717380 A CN 114717380A CN 202210278053 A CN202210278053 A CN 202210278053A CN 114717380 A CN114717380 A CN 114717380A
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- Prior art keywords
- oxygen
- supersonic
- secondary combustion
- lance
- oxygen lance
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 180
- 239000001301 oxygen Substances 0.000 title claims abstract description 180
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 179
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 127
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 230000008602 contraction Effects 0.000 claims abstract description 20
- 230000006641 stabilisation Effects 0.000 claims abstract description 6
- 238000011105 stabilization Methods 0.000 claims abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract description 9
- 238000009628 steelmaking Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000007921 spray Substances 0.000 description 19
- 238000005507 spraying Methods 0.000 description 8
- 230000035515 penetration Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention provides a supersonic secondary combustion oxygen lance for improving the ratio of converter scrap steel, and belongs to the technical field of metallurgical converter steelmaking. The front end of the oxygen lance head is provided with a main oxygen nozzle, the side wall of the lance head is provided with a supersonic secondary combustion secondary oxygen nozzle, the oxygen supply flow of the secondary oxygen nozzle accounts for 5-20% of the total oxygen supply flow, the supersonic secondary combustion secondary oxygen nozzle is of a Laval nozzle structure and comprises a contraction section, a stabilization section and an expansion section, the secondary oxygen nozzle is designed to have a Mach number of 1.4-2.5, the expansion section has a circular, elliptical or square outlet shape, the included angle between the secondary oxygen nozzle and the horizontal direction is 20-70 degrees, and all the secondary oxygen nozzles are uniformly distributed at the same horizontal height position on the side wall of the oxygen lance. The method can ensure that secondary combustion secondary oxygen jet formed by the supersonic secondary combustion secondary oxygen jet pipe has stronger air current penetrability, improve the reaction contact area of the secondary combustion secondary oxygen jet and carbon monoxide in the furnace, improve the temperature in the furnace, reduce the consumption of the heat-supplementing agent in the furnace and realize the purpose of improving the adding amount of the waste steel ratio of the converter.
Description
Technical Field
The invention relates to the technical field of metallurgical converter steelmaking, in particular to a supersonic secondary combustion oxygen lance for improving the ratio of converter scrap steel.
Background
The top-bottom combined blown converter steelmaking method is the main steelmaking method in China at present, and the end-point molten steel is mainly obtained from high-temperature molten iron and cold scrap steel. At present, the domestic steel industry is restricted by policies such as carbon emission reduction and haze treatment, the total molten iron production of blast furnaces is controlled increasingly strictly, and the domestic converter smelting raw material source is greatly limited.
The cold scrap steel is used as a green resource in the steel industry, can be recycled, and has high energy-saving and environment-friendly values. Under the condition that the amount of molten iron is relatively fixed, the waste steel ratio in the converter smelting is improved, the environmental pollution can be reduced, the steelmaking yield is improved, the carbon dioxide emission is reduced, and the efficient recycling of waste steel resources is realized. However, the excessive scrap ratio can cause insufficient heat source in the converter steelmaking process, and the product quality of the molten steel at the end point and the economic benefit of the production process are influenced.
In order to further improve the scrap ratio of the converter, converter steelmaking thermal compensation technology based on a secondary combustion method as a main heat preservation method is widely researched by domestic steelmaking workers and is widely applied to the actual production process of the converter. The secondary combustion core technical means is that additional oxygen is introduced into the converter through a secondary combustion secondary oxygen spray pipe, carbon monoxide generated in the converter during blowing is combusted into carbon dioxide, and the heat preservation effect of high-temperature furnace gas above a metallurgical melting bath is enhanced by utilizing a large amount of heat energy released in the process. The technology has low capital investment ratio, can quickly achieve the integral and stable rise of the temperature in the hearth, and realizes the purpose of improving the scrap ratio of the converter.
At present, the existing converter secondary combustion oxygen lance adopts a low-speed oxygen supply mode, a secondary combustion nozzle adopts a single straight pipe structure or a multi-straight pipe structure to simply link, and the formed secondary combustion secondary oxygen jet is easily influenced by a high-speed main oxygen jet and furnace gas vortex mass in a furnace, so that the penetration effect of the secondary combustion secondary oxygen jet is greatly inhibited, and the utilization efficiency of oxygen for secondary combustion is weakened. Therefore, the technical indexes of the existing secondary combustion oxygen lance are difficult to meet the production requirement that the waste steel ratio of the converter is greatly improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a supersonic secondary combustion oxygen lance for improving the ratio of converter scrap, which adopts a supersonic secondary combustion secondary oxygen nozzle structure to deliver additional oxygen, strengthens the initial kinetic energy of secondary combustion secondary oxygen jet flow, enhances the penetration capacity of the secondary combustion secondary oxygen jet flow, improves the contact area of the secondary combustion secondary oxygen jet flow and the oxidation reaction of carbon monoxide in a converter, promotes the combustion reaction rate of the carbon monoxide in the converter, further improves the integral temperature in the converter, and realizes the purpose of improving the ratio of the converter scrap.
The oxygen lance is provided with a main oxygen nozzle at the front end of the head of the secondary combustion oxygen lance, a supersonic secondary combustion secondary oxygen nozzle on the side wall of the head of the secondary combustion oxygen lance,
the supersonic secondary combustion secondary oxygen nozzle is of a Laval nozzle structure and comprises a contraction section, a stabilization section and an expansion section, and the design Mach number of the supersonic secondary combustion secondary oxygen nozzle is 1.4-2.5.
The supersonic secondary combustion secondary oxygen spraying pipe is sequentially provided with a contraction section, a stable section and an expansion section from inside to outside, wherein the contraction section accounts for 20-35% of the total length of the supersonic secondary combustion secondary oxygen spraying pipe, the stable section accounts for 5-10% of the total length of the supersonic secondary combustion secondary oxygen spraying pipe, and the expansion section accounts for 55-75% of the total length of the supersonic secondary combustion secondary oxygen spraying pipe.
The contraction half-cone angle of the contraction section is 15-30 degrees, and the expansion half-cone angle of the expansion section is 3-12 degrees.
The shape of the outlet of the expansion section is circular, oval or square, etc.
The included angle between the supersonic secondary combustion oxygen-assistant nozzle and the horizontal direction is 20-70 degrees.
The number of the supersonic secondary combustion secondary oxygen nozzles is 4-8 according to different tonnage of the converter, and all the supersonic secondary combustion secondary oxygen nozzles are uniformly distributed on the same horizontal height position of the side wall of the oxygen lance.
According to the different tonnage of the converter, the axial distance between the center of the outlet of the supersonic secondary combustion secondary oxygen nozzle and the center of the outlet of the main oxygen nozzle in the spray head is 80 mm-250 mm.
The oxygen flow of the secondary combustion secondary oxygen spray pipe accounts for 5-20% of the total oxygen supply flow, and the oxygen flow of the main oxygen spray pipe accounts for 80-95% of the total oxygen supply flow.
The technical scheme of the invention has the following beneficial effects:
in the above scheme, the adverse effect of high-speed main oxygen jet flow and in-furnace gas vortex mass on secondary combustion secondary oxygen jet flow can be inhibited, the penetration capability of the secondary combustion secondary oxygen jet flow is strengthened, the oxygen utilization efficiency of the secondary combustion secondary oxygen jet flow is improved, the secondary combustion rate of carbon monoxide in the furnace is increased, and the waste steel ratio of the converter is greatly improved. The invention can achieve the purpose that the penetration capacity of secondary combustion secondary oxygen jet flow is improved by more than 13 percent, the oxygen supply quantity of the secondary combustion secondary oxygen jet flow is reduced by more than 15 percent, the secondary combustion rate of carbon monoxide in the converter is improved by more than 25 percent, and the scrap ratio of the converter is improved by more than 20 percent.
Drawings
FIG. 1 is a schematic front view of a supersonic post-combustion lance for increasing the ratio of converter scrap according to example 1 of the present invention;
FIG. 2 is a partially enlarged schematic front view of a secondary oxygen lance of a supersonic secondary combustion oxygen lance for increasing the ratio of converter scrap in example 1 of the present invention;
FIG. 3 is a schematic top view of a supersonic post-combustion lance for increasing converter scrap ratio in example 1 of the present invention;
FIG. 4 is a schematic front view of a supersonic post-combustion lance for increasing the ratio of converter scrap according to example 2 of the present invention;
FIG. 5 is a schematic view, partially enlarged, of a secondary oxygen lance of a supersonic secondary combustion lance for increasing the converter scrap ratio in accordance with embodiment 2 of the present invention;
FIG. 6 is a schematic top view of a supersonic post-combustion lance for increasing the converter scrap ratio in example 2 of the present invention.
Wherein: 1-oxygen lance head; 2-a main oxygen nozzle; 3-a secondary oxygen nozzle; a 3' -constriction; 3' -a stable section; 3' -an expansion section.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a supersonic secondary combustion oxygen lance for improving the ratio of converter steel scrap.
The oxygen lance is provided with a main oxygen nozzle at the front end of the head of the secondary combustion oxygen lance, a supersonic secondary combustion secondary oxygen nozzle on the side wall of the head of the secondary combustion oxygen lance,
the supersonic secondary combustion secondary oxygen nozzle is of a Laval nozzle structure and comprises a contraction section, a stabilization section and an expansion section, and the design Mach number of the supersonic secondary combustion secondary oxygen nozzle is 1.4-2.5.
The supersonic secondary combustion secondary oxygen spraying pipe is sequentially provided with a contraction section, a stable section and an expansion section from inside to outside, wherein the contraction section accounts for 20-35% of the total length of the supersonic secondary combustion secondary oxygen spraying pipe, the stable section accounts for 5-10% of the total length of the supersonic secondary combustion secondary oxygen spraying pipe, and the expansion section accounts for 55-75% of the total length of the supersonic secondary combustion secondary oxygen spraying pipe.
The contraction half-cone angle of the contraction section is 15-30 degrees, and the expansion half-cone angle of the expansion section is 3-12 degrees.
The shape of the outlet of the expansion section is circular, oval or square.
The included angle between the supersonic secondary combustion oxygen-assistant nozzle and the horizontal direction is 20-70 degrees.
The number of the supersonic secondary combustion secondary oxygen nozzles is 4-8, and all the supersonic secondary combustion secondary oxygen nozzles are uniformly distributed on the same horizontal height position of the side wall of the oxygen lance.
The axial distance between the center of the outlet of the supersonic secondary combustion secondary oxygen spray pipe and the center of the outlet of the main oxygen spray pipe in the spray head is 80 mm-250 mm.
The oxygen flow of the secondary combustion secondary oxygen spray pipe accounts for 5-20% of the total oxygen supply flow, and the oxygen flow of the main oxygen spray pipe accounts for 80-95% of the total oxygen supply flow.
The following description is given with reference to specific examples.
Example 1
The embodiment is applied to the conventional smelting process of a 100-ton converter, as shown in figure 1, figure 2 and figure 3, the oxygen lance is provided with a main oxygen nozzle 2 at the front end of a head 1 of a secondary combustion oxygen lance, a supersonic secondary combustion secondary oxygen nozzle 3 at the side wall of the head of the secondary combustion oxygen lance,
the supersonic secondary combustion secondary oxygen nozzle 3 is of a Laval nozzle structure, the supersonic secondary combustion secondary oxygen nozzle 3 comprises a contraction section 3 ', a stable section 3 ' and an expansion section 3 ', and the design Mach number of the supersonic secondary combustion secondary oxygen nozzle is 1.4.
The contraction section, the stable section and the expansion section of the supersonic secondary combustion secondary oxygen spray pipe respectively account for 22%, 6% and 72% of the total length of the supersonic secondary combustion secondary oxygen spray pipe, the half cone angles of the contraction section and the expansion section of the supersonic secondary combustion secondary oxygen spray pipe are respectively 27 degrees and 4 degrees, the outlet of the supersonic secondary combustion secondary oxygen spray pipe is circular, the included angle between the secondary combustion secondary oxygen spray pipe and the horizontal direction is 60 degrees, the 4 supersonic secondary combustion secondary oxygen spray pipes are uniformly distributed at the same horizontal height position of the side wall of the oxygen lance, the axial distance between the outlet center of the supersonic secondary combustion secondary oxygen spray pipe and the outlet center of the main oxygen spray pipe at the nozzle is designed to be 90mm, the oxygen flow of the secondary combustion secondary oxygen spray pipe accounts for 8% of the total oxygen supply flow, and the oxygen flow of the main oxygen spray pipe accounts for 92% of the total oxygen supply flow.
After the supersonic secondary combustion oxygen lance disclosed by the invention is adopted, the penetration capacity of a secondary combustion secondary oxygen jet is improved by 24%, the oxygen supply quantity of the secondary combustion secondary oxygen jet is reduced by 20%, the secondary combustion rate of carbon monoxide in the lance is improved by 29%, and the ratio of converter to scrap is improved by 26%.
Example 2
The embodiment is applied to the dephosphorization smelting process of a 250-ton converter, as shown in figure 4, figure 5 and figure 6, the oxygen lance is provided with a main oxygen nozzle 2 at the front end of a lance head 1 of a secondary combustion oxygen lance, a supersonic secondary combustion secondary oxygen nozzle 3 at the side wall of the lance head of the secondary combustion oxygen lance,
wherein the supersonic secondary combustion secondary oxygen nozzle 3 is of a Laval nozzle structure, the supersonic secondary combustion secondary oxygen nozzle 3 comprises a contraction section 3 ', a stable section 3 ' and an expansion section 3 ', the design Mach number of the supersonic secondary combustion secondary oxygen nozzle is 2.0, the contraction section, the stable section and the expansion section of the supersonic secondary combustion secondary oxygen nozzle respectively account for 30%, 9% and 61% of the total length of the supersonic secondary combustion secondary oxygen nozzle, the half cone angles of the contraction section and the expansion section of the supersonic secondary combustion secondary oxygen nozzle are respectively 20 degrees and 9 degrees, the outlet shape of the supersonic secondary combustion secondary oxygen nozzle is square, the included angle between the secondary combustion secondary oxygen nozzle and the horizontal direction is 40 degrees, 6 supersonic secondary combustion secondary oxygen nozzles are uniformly distributed at the same horizontal height position of the side wall of the oxygen lance, the axial distance between the outlet center of the supersonic secondary combustion secondary oxygen nozzle and the outlet center of the main oxygen nozzle is designed to be 210mm, the oxygen flow of the secondary combustion secondary oxygen nozzle accounts for 15% of the total oxygen supply flow, and the oxygen flow of the main oxygen nozzle accounts for 85% of the total oxygen supply flow.
After the supersonic secondary combustion oxygen lance disclosed by the invention is adopted, the penetration capacity of a secondary combustion secondary oxygen jet is improved by 55%, the oxygen supply quantity of the secondary combustion secondary oxygen jet is reduced by 34%, the secondary combustion rate of carbon monoxide in a furnace is improved by more than 42%, and the scrap ratio of a converter is improved by 37%.
Through the embodiment 1 and the embodiment 2, the supersonic secondary combustion oxygen lance for improving the converter scrap ratio can effectively improve the penetration capacity of secondary combustion secondary oxygen jet flow, increase the oxygen utilization rate of the secondary combustion secondary oxygen jet flow, promote the secondary combustion effect of carbon monoxide in a furnace and achieve the purpose of improving the converter scrap ratio in converters with different tonnages and smelting working conditions.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A supersonic secondary combustion oxygen lance for improving the ratio of converter scrap steel is characterized in that a main oxygen nozzle is arranged at the front end of a lance head of the secondary combustion oxygen lance, a supersonic secondary combustion secondary oxygen nozzle is arranged on the side wall of the lance head of the secondary combustion oxygen lance,
the supersonic secondary combustion secondary oxygen nozzle is of a Laval nozzle structure and comprises a contraction section, a stabilization section and an expansion section, and the design Mach number of the supersonic secondary combustion secondary oxygen nozzle is 1.4-2.5.
2. The supersonic secondary combustion oxygen lance for increasing the converter scrap ratio as claimed in claim 1, wherein the supersonic secondary combustion secondary oxygen lance is provided with a contraction section, a stabilization section and an expansion section from inside to outside in sequence, the contraction section accounts for 20-35% of the total length of the supersonic secondary combustion secondary oxygen lance, the stabilization section accounts for 5-10% of the total length of the supersonic secondary combustion secondary oxygen lance, and the expansion section accounts for 55-75% of the total length of the supersonic secondary combustion secondary oxygen lance.
3. The supersonic post-combustion oxygen lance for increasing converter scrap ratio according to claim 2, wherein the convergent half-cone angle of the convergent section is 15 to 30 ° and the divergent half-cone angle of the divergent section is 3 to 12 °.
4. The supersonic post combustion oxygen lance for increasing converter scrap ratio of claim 1 wherein the divergent section outlet is circular, elliptical or square in shape.
5. The supersonic secondary combustion oxygen lance for increasing converter steel scrap ratio as claimed in claim 1, wherein the supersonic secondary combustion secondary oxygen lance forms an angle of 20 ° to 70 ° with the horizontal direction.
6. The supersonic secondary combustion oxygen lance for improving the converter scrap ratio as claimed in claim 1, wherein the number of the supersonic secondary combustion secondary oxygen lances is 4-8, and all the supersonic secondary combustion secondary oxygen lances are uniformly distributed at the same horizontal height position on the side wall of the oxygen lance.
7. The supersonic secondary combustion oxygen lance for improving the converter scrap ratio according to claim 1, wherein the axial distance between the center of the outlet of the supersonic secondary combustion oxygen lance and the center of the outlet of the main oxygen lance at the nozzle is 80-250 mm.
8. The supersonic secondary combustion oxygen lance for increasing converter steel scrap ratio as claimed in claim 1, wherein the oxygen flow of the secondary combustion secondary oxygen lance is 5-20% of the total oxygen flow, and the oxygen flow of the main oxygen lance is 80-95% of the total oxygen flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210278053.4A CN114717380A (en) | 2022-03-21 | 2022-03-21 | Supersonic secondary combustion oxygen lance for improving converter steel scrap ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210278053.4A CN114717380A (en) | 2022-03-21 | 2022-03-21 | Supersonic secondary combustion oxygen lance for improving converter steel scrap ratio |
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| CN202210278053.4A Pending CN114717380A (en) | 2022-03-21 | 2022-03-21 | Supersonic secondary combustion oxygen lance for improving converter steel scrap ratio |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115852083A (en) * | 2022-12-08 | 2023-03-28 | 北京科技大学 | Converter is high-efficient top and bottom combined blowing of carbon dioxide Secondary combustion low-carbon system and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535631U (en) * | 2009-08-26 | 2010-07-28 | 鞍钢股份有限公司 | Double-flow oxygen lance nozzle |
| CN108977620A (en) * | 2018-10-11 | 2018-12-11 | 东北大学 | A kind of single channel Oxygen Lance With Secondary Combustion and its application method improving converter scrap ratio |
-
2022
- 2022-03-21 CN CN202210278053.4A patent/CN114717380A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201535631U (en) * | 2009-08-26 | 2010-07-28 | 鞍钢股份有限公司 | Double-flow oxygen lance nozzle |
| CN108977620A (en) * | 2018-10-11 | 2018-12-11 | 东北大学 | A kind of single channel Oxygen Lance With Secondary Combustion and its application method improving converter scrap ratio |
Non-Patent Citations (1)
| Title |
|---|
| 化学工业部基建局: "《球罐施工》", 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115852083A (en) * | 2022-12-08 | 2023-03-28 | 北京科技大学 | Converter is high-efficient top and bottom combined blowing of carbon dioxide Secondary combustion low-carbon system and method |
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Application publication date: 20220708 |